Question

bantu jawab ya teman teman



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Answer 1

Jawab:

1.) 0.75 + 25% = 75% + 25% = 100% = 1

2.) 3/5 x (3/4 + 1/2 - 1/6)

= 3/5 x {(3/4 + 2/4) - 1/6}

= 3/5 x ( 5/4 - 1/6)

= 3/5 x ( 15/12 - 2/12)

= 3/5 x 13/12

= 39/60

= 13/20

3.) 1.25 x 0.7

= 125/100 x 7/10

= 5/4 x 7/10

= 35/40

= 7/8

4.) {1/3 x 4/5} x 3/4 : 1/6

= 4/15 x 3/4 : 1/6

= 12/60 : 1/6

= 12/60 x 6/1

= 72/60

= 6/5

5.) 5 1/2 - n = 2 1/4

--> 5 1/2 - 2 1/4 = n

--> 5 2/4 - 2 1/4 = n

--> 3 1/4 = n

6.) 6m = 750.000 ; 4m = ...?

--> 4m = 4m/6m x 750.000

--> 4m = 4/6 x 750.000

--> 4m = 500.000

7.) A : B = 5 : 7 ; A + B = 312

*A = 5x ; B = 7x

--> 5x + 7x = 312

--> 12x = 312

--> x = 312/12

--> x = 26

* A = 5x = 5(26) = 130

* B = 7x = 7(26) = 182

8.) Andra : Arman = 5 : 6

Andra = 25

Arman = 6/5 x 25 = 30

9.) A : D : R = 3 : 4 : 7

D = 32.000

jumlah = (3+4+7)/4 x 32.000

jumlah = 14/4 x 32.000

jumlah = 112.000

10.) jarak J ke K sebenarnya = 550 km = 55.000.000 cm

skala = 1 : 1.250.000

jarak J ke K pada peta = 55.000.000 x 1/1.250.000

jarak J ke K pada peta = 44 cm

rajin belajar ya deks!